21800372

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{293}}^1$

素因数の和:416

約数の個数: 48

約数和(自身を含む): 44452800

約数和(自身を除く): 22652428

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 76, 89, 178, 209, 293, 356, 418, 586, 836, 979, 1172, 1691, 1958, 3223, 3382, 3916, 5567, 6446, 6764, 11134, 12892, 18601, 22268, 26077, 37202, 52154, 61237, 74404, 104308, 122474, 244948, 286847, 495463, 573694, 990926, 1147388, 1981852, 5450093, 10900186, 21800372]

約数ペア:

[(1, 21800372), (2, 10900186), (4, 5450093), (11, 1981852), (19, 1147388), (22, 990926), (38, 573694), (44, 495463), (76, 286847), (89, 244948), (178, 122474), (209, 104308), (293, 74404), (356, 61237), (418, 52154), (586, 37202), (836, 26077), (979, 22268), (1172, 18601), (1691, 12892), (1958, 11134), (3223, 6764), (3382, 6446), (3916, 5567)]